EP0573814A1 - Balance avec protection contre surcharge - Google Patents

Balance avec protection contre surcharge Download PDF

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Publication number
EP0573814A1
EP0573814A1 EP93107963A EP93107963A EP0573814A1 EP 0573814 A1 EP0573814 A1 EP 0573814A1 EP 93107963 A EP93107963 A EP 93107963A EP 93107963 A EP93107963 A EP 93107963A EP 0573814 A1 EP0573814 A1 EP 0573814A1
Authority
EP
European Patent Office
Prior art keywords
levers
balance
abutment
weighing pan
balance according
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP93107963A
Other languages
German (de)
English (en)
Other versions
EP0573814B1 (fr
Inventor
Ferdinand Schneider
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mettler Toledo GmbH Germany
Original Assignee
Mettler Toledo AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Mettler Toledo AG filed Critical Mettler Toledo AG
Publication of EP0573814A1 publication Critical patent/EP0573814A1/fr
Application granted granted Critical
Publication of EP0573814B1 publication Critical patent/EP0573814B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01G—WEIGHING
    • G01G23/00—Auxiliary devices for weighing apparatus
    • G01G23/005—Means for preventing overload

Definitions

  • the invention relates to a scale with a weighing system secured against overload, in which two pivotable levers are used between the load receiver and the weighing pan placed on the load receiver, which carry the weighing pan, the outer lever ends abutting the weighing pan from below and the inner lever ends thereof engage a vertically displaceable abutment, the abutment being under the restoring force of a preloaded spring in such a way that when overloaded, both levers pivot and overcome the spring force and form a parallel guide for the lowering weighing pan.
  • a scale of this type is known from DE-C2-3242156.
  • a platform is placed on the load receiver, on which two V-shaped plate-shaped rocker arms rest. Their inner ends engage under a spring bearing arranged axially to the load receiver and displaceable under the restoring force of a prestressed spring.
  • the weighing pan or a weighing pan support rests on the outer ends of the rocker arms.
  • This known overload protection device which is arranged above the measuring cell and outside the housing, sufficiently protects scales with a small nominal load against damage caused by a moderate overload.
  • the invention is therefore based on the object of providing a device for securing the balance against overload which can be accommodated within the balance housing and without increasing the overall height of the balance.
  • the overload protection according to the invention enables a rigid construction, so that it can also be used for scales in the higher load range.
  • the stable construction results in a low sensitivity to corner loads.
  • the overload is always distributed to both frame parts because they are coupled to each other at the ends of their legs. As a result, even with a corner load, both springs are always acted upon essentially, ie within their elasticity.
  • the rubber elements inserted between the frame parts and the weighing pan allow excellent damping of the vibrations caused by a dynamically induced overload.
  • the same frame elements can be used for different load ranges.
  • the setting of the load range can be adjusted by appropriate choice of the hardness of the spring in the abutment and / or its preload.
  • the overload is preferably absorbed by a stop part, which is supported directly on the bottom of the scale housing.
  • the upper part of the housing is not burdened by this and does not have to be used for recording of the overload.
  • the side walls of the housing and the upper cover can be made very thin-walled and serve essentially as dust and splash water protection.
  • the two levers 17 and the yoke 11 lie to the side of the load cell 5 and encompass it.
  • the force F is transferred from the weighing pan 9 via the 4 damping elements, which are made of rubber or a corresponding elastic plastic, to the lever 17, via the abutment 27 transferred to the yoke 11 and from there to the load receiver 7.
  • the system normally behaves like a rigid body.
  • the levers 17 come into abutment in the region of the damping elements 45 with a stop buffer or base 47 which is placed directly on the bottom 49 of the housing 1 or is part of the same.
  • An elastic buffer 51 which dampens the impact of the levers 17, can be placed on the surface of the base 47. If the bases 47 are arranged directly above the feet 53 of the balance 3, the overload can be passed directly onto the base of the balance; a mechanical load on the housing 1 is avoided.
EP93107963A 1992-06-10 1993-05-17 Balance avec protection contre surcharge Expired - Lifetime EP0573814B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH1854/92A CH683716A5 (de) 1992-06-10 1992-06-10 Waage.
CH1854/92 1992-06-10

Publications (2)

Publication Number Publication Date
EP0573814A1 true EP0573814A1 (fr) 1993-12-15
EP0573814B1 EP0573814B1 (fr) 1996-06-05

Family

ID=4220163

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93107963A Expired - Lifetime EP0573814B1 (fr) 1992-06-10 1993-05-17 Balance avec protection contre surcharge

Country Status (5)

Country Link
US (1) US5373116A (fr)
EP (1) EP0573814B1 (fr)
JP (1) JPH0743619Y2 (fr)
CH (1) CH683716A5 (fr)
DE (2) DE9306197U1 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2610595B1 (fr) 2011-12-30 2020-06-17 WIPOTEC GmbH Pont de pesage
WO2014106260A1 (fr) * 2012-12-31 2014-07-03 Fujikura Composite America, Inc. Balance électronique
DE102015010418A1 (de) * 2015-08-11 2017-02-16 Fresenius Medical Care Deutschland Gmbh Peritonealdialysegerät
WO2020181063A2 (fr) * 2019-03-05 2020-09-10 Intuitive Surgical Operations, Inc. Dispositifs, systèmes et procédés pour maintenir un champ chirurgical stérile
US11892340B2 (en) * 2020-02-28 2024-02-06 Honeywell International Inc. Weight scale with centralized lever supported receiving tray

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3599739A (en) * 1970-05-06 1971-08-17 Cutler Hammer Inc Overload protection for strain gauge load cells used in weigh scale load measurement
EP0006237A1 (fr) * 1978-06-20 1980-01-09 Sartorius GmbH. Protection contre les surcharges pour balance de précision ayant des plateaux montés au-dessus du fléau
DE3242156A1 (de) * 1981-11-17 1983-05-26 Sartorius GmbH, 3400 Göttingen Waagschale mit integrierter ueberlastsicherung
US4420054A (en) * 1981-10-23 1983-12-13 Interface, Inc. Weighing apparatus with overload protection for off-center loading
GB2159966A (en) * 1984-06-07 1985-12-11 Pitney Bowes Inc Overload protection for platform weighing apparatus

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH634655A5 (en) * 1978-10-10 1983-02-15 Mettler Instrumente Ag Precision balance with overload protection
CH656712A5 (de) * 1982-07-20 1986-07-15 Mettler Instrumente Ag Waage mit ueberlastschutz.
US4611677A (en) * 1985-03-07 1986-09-16 National Controls, Inc. Shock proof scale

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3599739A (en) * 1970-05-06 1971-08-17 Cutler Hammer Inc Overload protection for strain gauge load cells used in weigh scale load measurement
EP0006237A1 (fr) * 1978-06-20 1980-01-09 Sartorius GmbH. Protection contre les surcharges pour balance de précision ayant des plateaux montés au-dessus du fléau
US4420054A (en) * 1981-10-23 1983-12-13 Interface, Inc. Weighing apparatus with overload protection for off-center loading
DE3242156A1 (de) * 1981-11-17 1983-05-26 Sartorius GmbH, 3400 Göttingen Waagschale mit integrierter ueberlastsicherung
GB2159966A (en) * 1984-06-07 1985-12-11 Pitney Bowes Inc Overload protection for platform weighing apparatus

Also Published As

Publication number Publication date
JPH0743619Y2 (ja) 1995-10-09
DE9306197U1 (de) 1993-10-14
EP0573814B1 (fr) 1996-06-05
US5373116A (en) 1994-12-13
CH683716A5 (de) 1994-04-29
DE59302796D1 (de) 1996-07-11
JPH062173U (ja) 1994-01-14

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